У кого yandex jabber, кто нибудь увидел изменение сертификата?:

Issued to:
Common Name (CN): domain-xmpp.ya.ru
Organization (O): Yandex LLC
Organizationl Unit (OU): ITO
Serial Number: 42256498357593789073838215227123477608

Issued by:
Common Name (CN): Certum Level IV CA
Organization (O): Unizeto Technologies S.A.
Organizationl Unit (OU): Certum Certification Authority

Validity:
Issued on: 20131219154303Z
Expires on: 20161218154303Z